. >> on a side note, that wasn't the real joe biden. that was a stuntman. >> i don't think it's a big deal. i mean, she actually sang the song. it's not like milli vanilli where somebody else sang it and she claimed it. it's cold out there. i can't sing in a warm room. >> we're going to find out, right? >> yeah. >>> let's go now to tiffani thiessen. so many of us grew up watching her on "saved by the bell" and then heating up "90210." well, now, she's speaking out in a revealing new interview about all that pressure to stay slim in hollywood and why she's pushing back. abbie boudreau has the story. >> hi, kelly. >> hi. >> reporter: as it seems, she was the ultimate girl next door. kelly on "saved by the bell." >> the all-american girl. >> reporter: those high-waisted jeans made you famous. >> oh, i guess so. >> reporter: two years later, she tackled the racier role of val on "90210." >> is that new? >> yeah, i got it today. >> reporter: you've been a sex symbol for 20 years. >> you know, i think, the older you get, the more it feels goo